copy: handle rename internally
- add rename parameter
- don't collect copied list
- report "moving" rather than "copying"
- remove renamed files
- don't return copied list
- simplify callers
abort: repository a not found!
255
abort: error: Connection refused
255
abort: repository a not found!
255
abort: destination '../a' already exists
255
abort: repository a not found!
255
destination directory: q
abort: destination 'q' already exists